SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbb607d74e5740d4a617d59b904d52c0988a8c372464cbc87f46f28820c9bf97' 
  AND token = 'WFvhwgM85X5NlHXbcfYQkKfJLZe3hqRAO7VcfX5wnYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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