Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e4622510d16abe74cd511bc74bd21061c608a8298ffc56fa313a1a611b5f13' 
  AND token = 'UpC7oYQIhuMRYyfaWtUzdLF32HaNAw/V57yku7Hgu0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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