Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79c6918593cc0b38ef5ed032af7f78bfc3a51924f7d344df9fcb4db2d4f51245' 
  AND token = 'VHIL+XeO2Ki8JJwcrXI3WFHR0d2/4wDc7BHjYSjofM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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