Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37dee847121f27d78ae595a4b4e972559e6ae62f5f602580d52426795a9216f6' 
  AND token = 'TGMX+k+zDJRFF1oiktd3FlsWNjC2f1YEarSVBScIK6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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