Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9df4c5bae9a41ab5b63bc1c75a7c0ef986bd33d660eb618b0022b7b49ae23b98' 
  AND token = 'j0rgC9btA1m9+guw60Pkr1TrB/v55yKBK7osMzPHqYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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