Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb1fc3e74167ab6771fe06388ef8082bb38a14abd3de59d809a4c654860ee1ab' 
  AND token = 'CBtlqjV+s4uxmyDCCJq1TW0+yx7ZdPC6uJaI6q8EMcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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