Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9154960ccc9a372324c2e001cfb4e496599626f5481516b30bc550785ab76cff' 
  AND token = 'vFVDHramAAYEjVp32IppPRRBWm+xvn0PWmlaz8yK1Oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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