Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70dc37ce25b008d49f9f38a48b2590aa92d4bb4452cb0bb406cf26dbafc46d7a' 
  AND token = 'HzIfuRrlZCmsJ+d0MfEIhnz6bmmh5dXrMimfT8+u1ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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