Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '523943c13e902abdf7eec49862ea7ee5e11d5484e91ae1f15ae0788f89395f13' 
  AND token = 'FjXuWYiHb5uVP8Ws3OBFDMQqmRtKNf9kuQa/WlUHiCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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