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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97fa069bd5f878a3b5e529e7b95c67f76b5664759c296d913608ce2a1edb9784' 
  AND token = 'YNt6jcW8YvzNiy8TmjJ7o8cGnCKmq/lmb7M9R/tDIY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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