Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90d88571746d724e1f0cb80b37658cecca75623b021b526f15c7251fbcadddf6' 
  AND token = 's+NO5R4ZDDHYtn5IjymdotovsHajt6j+gQx29XKrXds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}