Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2e5281ae084b93d5fd267f1ccb32a935a061b3495ca9367922e7ac75d4df397' 
  AND token = 'fJYTbUCT+Dnbj03hlveq0bap4e6GSNIhZ3OMH3rY+mY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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