Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e6a2c9f207f9be579c18ef0504f58508e66477678301bf56fff77e252ac0f04' 
  AND token = 'kPilpbUXKqneyI9GB/+AM3G0pjIK+zwOLK/8RIAv6K4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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