Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c872769360cf179edf2fc7d0342ca3f4f15b12895b85793be27a39616d18b5cf' 
  AND token = 'nm6uAm1tklRh8EXytpyNQuBaoHoQSroV9g3DP5Ibnxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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