Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81b5bfb3dd4ac58104d13eb1a3dda743c4124cff74a70e396bddde087a3b553f' 
  AND token = 'XHL1vHAJxunM1fp11S2CIUtysqoP70gD72LaNPB4lXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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