Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c71b4c2a2e59f1db4d21927afca9fbcfcb62becf02ada3cbe6a9de0e6501e192' 
  AND token = 'Za3/9SwWHA1pGKn9ed9gfr4rqZ1Sz3iwPFq/JaWIdio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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