Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1393b23c046620d2e9a799c525037afebab6d00acedb9db61015931a81d577e5' 
  AND token = 'Tov/lXfsL76F40R+EeXsVLkslOqPCtQPAkzvZ/Q8XoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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