SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4b1d04d0c189a97b306f98c128a4bd85a3c9fba9d658096411b8e470230815bd' 
  AND token = 'GxXvma/bHwYDZtrFbVYd0YE1/c+SPfxVPtzJ+/2C7DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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