Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c6eed7f39288a85f8b96e3eefb76c5aa75dc173504b8f0a8f790292f6c043edf' 
  AND token = 'FnPpxIIzbCNvB1ytgl/I56asSyUvg9QADb45FREoaBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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