Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fb97bd61714ca8bec3f9252e35f4f1dc19298c1e655e4acbec20816aa19b4eb' 
  AND token = 'Jyciebsp15WP0I2wX7Bqq1dqgaBeb7M8g5+z8Xp3AK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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