Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af2fdb433ad4f65344eeb35d421fac2c526dac5529541267d222e9c61ec1d1fb' 
  AND token = 'O3Ew63QaGtzkadYS1hCXKTFZ3ZGnOK1eCtA1p/WTjvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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