Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2861f1805ae4f726938700564611f5dfea43e6e040ea95b1a97ed100c655b3c' 
  AND token = '6DuaU8DNrHnQDDsNjBLjlbGQQjk53+53GKqrrZbIcXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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