SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e64f6f701cf2671e1a429cc1047d0becf3936d736e8275fdd02492bfb2a6c5f8' 
  AND token = 'W+IUwsvYZe3eMqnGQJGEF5BujZV/ff+uLwoVBZqNgF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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