Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6be486b2aad6a0d379b5703fa3b3d4aaaa2681297f933b20a28d899f56ed5b39' 
  AND token = 'wpZdqVMV3PBkD0MTVlc8awh9CE3PXhrFXHxX+4/fyic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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