Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca885b9bc5adf01854f0798c187ca7e2498446df97803ffd8004dee3b8cf7784' 
  AND token = 'Zf+t5F2aQNhaYq5snB6yGtvX8t8DSLbt3JMCYYAu/dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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