SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cea45255b82f56f6d48397dbd694d0dbc22513932e48c9b98df68aad1e244a80' 
  AND token = 'AApzg7VUCzqV1yzqjiFKNyChxOey1yIM/EGQvLyQKnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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