Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09f19b6b389fd487f2f44b64317951deabcdb8c731feefb18bc770fe219ac246' 
  AND token = '2s1Ir68z6SHpZem6h6puBQClWHZfltu+v+zi1ZvfSkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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