Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f83d21916a77d164f07b6f61ab7a25dbd58a87afffd7b72c9df733b2b736d7bd' 
  AND token = 'kgOvvu+O0kaMd43TxocrfOukGN38otu6/yvnLNNTlI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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