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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fac0b1d233f3f63ab5bf4c7aca0d260cff1ff0ac5451be1df7a07626e098732d' 
  AND token = '2TjvNxl4U7MIl3mC+9k8XSHDVSnWUp9vgH0OYy6pth8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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