Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be549a8a76c9954cc200cb8fb2fadd842017474c37168e98cd24ab0260f9490a' 
  AND token = 'BBKXj88SGW1UE7tWMqOqyMOGdbQ+++TM5SGIlHhYnh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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