SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e36f6ee1806c8741b2c333af455ab9f98e7b5a8f828c144327860d66cbca573' 
  AND token = 'zKJjYz3KXpcWJkWP6I2U2vmssrDpb9v+L1DJhoZDwfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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