Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca43931c3e7334fd7e561d29ebdb76d08189a981b69ace27555c1ce6992e908b' 
  AND token = '71zkS8X02lB0fUCl+UTHD80+U2k0OmUiCxmiNslYiSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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