Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e5720f2f59b254712ddd4e2c607cf58675deb46866a7694e2421132df59faff' 
  AND token = '2YA7gC2IcnuLuGicN240vrzpdTTCoAE2MnLaB84rL3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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