Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66c677e6c072b9691085aeeed52cbd8e2a99c7849ff2d0b928f722a2540d9a6a' 
  AND token = 'vrcsNaeQSbzX7Dyi/E+RTwzU6PVljeRq2rkjcHzdBa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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