Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04a2912e54cce1d9ad54122955bc2480c4f63d14ec827be266bce2b0dfd8fb9d' 
  AND token = 'cXzC0CK0/DrkF2+3FiXB5XYppJBIwtzG/BZazW9BZvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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