Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d5cc097dd959b4c82e832fd1ea8a4048a5a7b87faf706533d7779e3e6bc386c' 
  AND token = 'RSANqgtyQmvHNyscE7721R60shEDa8j1qettJKcZLkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}