Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18bbec27bbb9aeb3c271e99e1a952faf61303982e77dd38f92696143cceab005' 
  AND token = 'PXf3oJLPu9K8BbQU89HunoJnC6LDx8hFljYRzDmADz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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