Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28459c04986a98332175ca12d3f2707e038f779048f7fb27f96e0b864ad50831' 
  AND token = 'VYsafBYcBo1Hx3+1uEkEFePm1TVBMwkeEJpl4baGjac=' 
  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"
    }
  }
}