Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82ed9fc528c721b211fccccfc2ebf836da29cca38b452799fdc156eb595cae3' 
  AND token = 'S0M5C3LBz+NUYbWkr+Ku6iCDfqXIFkUCbcaLmDfC0RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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