SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94bf697c788dc22695f312b63e4e6d581367b59f0fe69e946d2e20f7d0bba298' 
  AND token = 'UvY8Oiz0P3WfqHu+HH6GbNGViRuUHQH/KV2qLMA3lgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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