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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ced3471def0228e6f38dcf0030e2ab353a5dc75f8ea02b7f0a56be61ef241e' 
  AND token = 'TbQOW8CKFHyllRd7HAHAten5f/cIfx2KAaVlj9xBScU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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