Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ef80bf3df170fc614ebe095186dc5b1fa88080a2d3e9bb84fa893463215eaf' 
  AND token = 'q4gY7R+meclQ9hdXb66Mnblr93HWBsWOmu5qvpHq18I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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