Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74036a9963617d85976a9cd7ae650f8d466322852078e5f95388be342500d28d' 
  AND token = 'K1rwx0xhBedJltN74ExpL7k+hSjOkpNJ0Y7G/rrI6ZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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