Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fa89d8bcc7e0039a5088e9dc41fbc4b1367df989d2ffeb3ca03ae59cd6706cc' 
  AND token = 'u6JpjHuVVXYhLTWNFR8kfgpkrrhbDQ5dZkfYr6a9M44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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