Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51df7e10e67bf5719944a23c424f307474c8ba7625de38f01b40ecc8a7a5ab45' 
  AND token = 'UVTe2xfBap3xXUKNutr5O/Sbxj07MH/RJn3ShAKXqUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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