Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7043530f04164a21095cf4a4a086328595f46925120ffe424a3813b98bf50667' 
  AND token = 'fVHCyrzfCre8WG1pYCTiWgfzkNK342i7JO3dVv+EF1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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