Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bd6391f40c35d70fbfc1d51091d030a0f2a7620639c16978595d43acdae7c40' 
  AND token = '1J/6D/mh2cILg48S7d4XabdJYWiEqMK5bxWRW2DFe/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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