Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5af7e7d2e217d48b8c0525d974ee043d8d642a3c53832f19c3c3db1ca1244e9e' 
  AND token = 'B54SBLeajIoUgzeKyrJ/3c5CXloFRDUK3p5PAfM4WoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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