SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2658cd0603cc9545190deae45d67ee8ebfc836f973a72c89ad2213155fcc49d6' 
  AND token = 'v9LF0QfbkZwYipc8liFZEAtHBmP+17ZjjLV7a1wj4Gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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