Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24a31630fdcfef824355a5d1979f7910531dd4fb169c872d6e1632da8aae1e11' 
  AND token = 'sAgUoH4/NvsejlYan6J5fRLtPUlV/juMoqV8aDz9kdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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