Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b73584396700560bff88aee35ea4b54b03217ccc4e7b9294e9b2db3fb2b58cd4' 
  AND token = 'FxwsMHChSQEyDT7V7+ExQKX8awM4Ru3Pz93p12r2X5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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