Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04abb8abe9b875a4520112573981f539a47faa83955442464d7ae4f286e32c3e' 
  AND token = '5kNtTxf8hyld9LWqYZQ7QAG9BPsJZFiiyAWZxCjL3SM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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