Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7899007aed353d56c9fc4db8eae7ac7cddfe1fbae24032efd029cab7f6fd000' 
  AND token = 'Ffy9CEbd430RHd8F8yWBb8SeaRSX1EYIb+GCrX5aTOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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