Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '363ea1fad0905c9929cb2e416550e454e42c6a92d947696f5811d83b8156db47' 
  AND token = 'mKpX4TliVFs6bn077aZbC/snjQiKYit2KATv+Vu4IUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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