Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccf302dfaaa9aa8b1b4277060d26e6769d702b0aa77a8ee598054cebcd03e629' 
  AND token = 'P5E/M1zWeCD80mWQ4ziW+bLlxIc/4f+YCWptZyRhT54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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