Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f1f0164052f1f25edbfdfd82a3d455fb230b3e611019cbbfb245482c3b630c1' 
  AND token = 'sFXwFvr/VpKFEGAFUcjus4ngwAm4ewxT2b0mJYVffyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}