Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f60e59421f656d8891d8510b0d5a415792ff21f2944c2c2ffe997da0a65c7145' 
  AND token = '4RqFlZvCE1/CZ8wbeF5gWhSaFnhDcTb3nXNjU4v4yzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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