Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54155d99f5e13af24e2345d0faf067d599918154a7222767ccff33a9a6ebc413' 
  AND token = 'vw9/Ikb005KWqaeM9g+lwRJijqS/0zAO3kj9X+gRcLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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