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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32627f279e4ba43479dd1dd7d62bc059bd2207f4ab9ddbf08bf737708b677341' 
  AND token = 'yXilN3Yc56ruzdqMqwZlJ2tdwEKJK2u/+RpVrZVUkF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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