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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4316a4e3baac9b6647bac1403c7616a20eb14d2861d54f85ba282a24d2f4da29' 
  AND token = 'JoRM1V9JgQ4J1FdGIwBx7QkWqyY2gDrVCdXkiJO8dz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00191

JSON explain

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