Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b52499f0cf9343f624364ea95e4e8d6b7e2d0c1d1ecb50f6e29adf0c4816c40' 
  AND token = 'fWtIti9I+OwTR4zHfwudTh5FxZ0ZTSIt1Hn/5gE/SSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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