Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e6643c47ebde3f34ea794b9a145df166d2d7d6a6b60cad8ea9ff8e005de2517' 
  AND token = 'g0y8vs0a5V8NrCK8wrMdZtkdr0Xlzkenx0TxpHGTCRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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