Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee2ab0d727ea5eeb10d2f7a8fbcf231c36be13df7e87ba7094aac4ea953c19f4' 
  AND token = '8rSM4+uPr48lkzI4OR63Sx1G2wdwCIUv6wicAYPxPrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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