Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be3b6f52cf92a617acec7da20d00a0d3b2b68facd2009153d905a32162bc33a4' 
  AND token = '8PJOh5HvviSU3F4Z54B5IN+GRXrhzGJavtKhqcSGH80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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