Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef9bcc68f02a5017bf7358bf98512716190deb8585f63bf074236b05a247bda' 
  AND token = 'nylNRpbcU7+XyfPRMv4bZE8+pqbY5K37+wVcnx7ke0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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