SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4924b67e80a2eb2306c678c5bc444022f1afdd9ce1090ca83f656133a0133526' 
  AND token = 'AtzX5ZVItPrCxUy0mwTl5jKDJjYgV5KY3ujkT/nhqKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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