Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '545927a143898b565383ad1abc700caad3a97d1ac3107608e41130b6ab9c59a7' 
  AND token = 'Gsn4ArzgIltkCyjgQkjC7M2NA46QMRGVBQWTEE1IXgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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