Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1425fa2f72596e487e0266a6e9db6d6712a452e62ca6a1c773907b3ba7cebc27' 
  AND token = 'eriOkvakgQa1sFEx7pceKGlernMTCl1gKfESHLJQkFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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