Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0d1c38db8fef58559ee551340babd164c9c12601c27938e33f6c494cfb0a298' 
  AND token = '69Rm6FrNPpOxEL8Z7Ab4fCmGTfOAIoZkZQSE25PE/P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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