SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da4c9db6fc393cf04d4fd5659262ac631bca4416f5d995761ee2c529e58ba25a' 
  AND token = '2dMIRmoqCv4tyuY3V/X4zTOZgK1Sht3jKGwW3hpQYh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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