Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6d0ede7733434baaaf14ea475ce5a0ac3a6290912347a1daab3f0168219e5f1' 
  AND token = 't9Yoynb/QRSdQQM/nDHi+BX72epO4gFbbWvcEXOz4sQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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