Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1293dcfd56c4d9308a158caf5f4135e34edbe6fb020127f9d39ab4e312aa6579' 
  AND token = 'uJNAeFrxrtDX43pfuHMrlmmhXjPKaOVH8sIlr2+cyCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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