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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23a59169b86fef0abc12b681545b01f07f30f720a8b4a039685e874c54576e37' 
  AND token = '04phcFx0+UbnRj3KhER+zAO+uglhOnbBB2XdkxZ6w+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}