Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c137d6684e625287c74a5022e7487a75941b41fb4bc05fa7b11ae61c6f9b8c5' 
  AND token = 'D3LQLBGSov0b1Scn47LgYcsaK+5oqB6s+AclWp3Qga4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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