Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6312f81d88d408d1bd1367caf476c557d92b7380dcc5ca9b489fad513bb6556f' 
  AND token = 'IhVIDI190wlcQxximtUjIWnm6R8dbyZwkrTQ4m3wC/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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