Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ff2cb6520301ad978933d47278bd18b6b1196164e8fbef168849e71da94f16c' 
  AND token = 'rpe674C5a9mU7Sn2sB9Qh18OADyIt+ByFamv4oDYknI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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