Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de0390a0db55b06c2aef18fd769c58a4c1ef4cf566b9e300b83577606ac353d8' 
  AND token = 'jH9ZNXOJGn0bCosn4z1DFbmoRW2LHkAsC0p1GHzDmjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}