Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e0ba936e5057ab48a3e8d2b38a63fb0617a6f267fc213d87b49e4cdb38f600f7' 
  AND token = 'tV89SPTfg7MsI7s+coVRlO79I0VaILbdPpAeFPiO39Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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