Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fba7a9eb655d98a0d369f0d8f6441ea030f26c4f06f2dcc50ff969aaeb0c547a' 
  AND token = '0nRSgQD2HteBZsu/1P0C+OzV9I7Q2qD4MiGkd7GGYKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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