Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f40f2571ce858c65836b457b60f5c7fc2c4924b1cbcebca630a8c67fada99a22' 
  AND token = 'RUvipc+iPLWeciTy+LRqx9VSxl7EtUejr7lAY3VEwqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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