Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff983f11d4b6fd641de1d3df3064ead830bab601a2a54fc3758804d5ed5c8fea' 
  AND token = 'rMZHdlB9cahBQ/6EfDTHIYF2o4284QLLND3duxToyGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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