Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2acab8bb7c78c86653453b6d36f5d1057dbd960f294f98d5975fa725dc6445ef' 
  AND token = 'ayGjoSOuDd6+O+IBr1ssfiO9pDN6LO/yOYvg60LlV0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}