SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f3f674c7f4db429f525a532256b4f6e3d83389087677324706e3016918109a6' 
  AND token = 'xitx69qLvPZMzDnH+mLuAtRd/CqfdJFGZEBsmB2ySlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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