Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af47de4d2a6b1f7cf7ed30981aa8cd42c568334e2ac96b7b343d45806c10977b' 
  AND token = 'dfQMs1eJ2XgdVfNFe3zfYnku/+Q0xa4cpxzqBu7dlvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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