Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccd7cee893b67f73ba2e62b50be7c7941b409c3ef9ec01230370ad22d83edee9' 
  AND token = 'O1SlN/lRtWP8G2URnsH9EZpOBTps91ecrToXXlphgGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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