Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f6d923feddf1c4b04802cfbd1ebefb109ce1134564fd77019ce4abc41a0192bb' 
  AND token = '3816t40TOv5BhEoxt604tt50Aljf+a8Xs8a60ht4tmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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