Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf7cf5a29b687738c0bd958275ac10b105acb356b3dbdc7591cda554b4219085' 
  AND token = '7+06LkjnHcQ7ShMuByjxfjrDQ8hHE2M2Zb2v+8UItJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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