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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042445dd3c0933633c851b9dd4ba802682848fde941188da357cc978d77150f0' 
  AND token = 'GKeG/0Atb4ZaWyDUW+qn/VvWwV8cvbn/kblQdiLE93E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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