Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3189f2c8d34c2ab61666ad554574bf223e2ca7e7ccf0a31def0b28df691061c' 
  AND token = 'sg5p1dfk8AJZ5C2qVoIXtPWcptXn61ZJnHb+dpKibqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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