Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05c8cc8b0ec9e42f3c6e97f365f0324350fa3d61d3407e8b294943c3af2dcbc3' 
  AND token = 'VUxmL6E6dut0wSc8wj8byNlxdk5wLcNfAKcJMYBudR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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