Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3180f7beb8de571093294e61876138c90c2d57bc0e965809361c6d1bfe472c6e' 
  AND token = 'v66lZBiKGSXZrLXoNih/CXihyrhHQ72SIHdPF0gbizg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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