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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d179f1b32891795b14f929983934659277a7338fba4e93f6f43b742e1e0f91a' 
  AND token = 'IHqOEzkb4ebVZG0u3WDUmRCBPHcxQNwawQL4LYtBSuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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